E.g.f. satisfies A(x) = exp( x^3 * A(x) / (1-x)^2 ) / (1-x).

A378095

E.g.f. satisfies A(x) = exp( x^3 * A(x) / (1-x)^2 ) / (1-x).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =12a(4) =120a(5) =1320a(6) =16200a(7) =234360a(8) =3991680a(9) =77535360a(10) =1678924800a(11) =40142995200

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